Effects of Global Warming (Chapter 4, page 2 of 3)


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Chapter 4

After the introduction of synthetic fertilizers, all farms have stopped using the manures and have resolved using these chemical fertilizers which are cheaper, more effective containing better nutrients than the manure, which is formed from the decaying of animals and plants. Sometimes, to protect the crops against diseases, pesticide is sprayed all over using helicopters! These chemicals damage the soil at such a large rate! It stops the functioning of bacteria and after the plantation of several crops; the chemical filled soil automatically becomes unfit for cultivation.

Soil can be damaged by various other human activities too. We have discussed in the first chapter about deforestation (recall what it means!) which causes various unimaginable damages like the wiping out of human race from earth. Deforestation not only causes damage to humans and wildlife, but also to the soil. We know that tree roots have a grip on the soil preventing it from being washed away. So if the tree is cut, the natural forces, i.e. wind and water, wash it away, leading to the lack of top soil, so making it unfit for cultivation.

Now-a-days, there is random mining and quarrying is taking place for various natural resources. Mining eventually means, digging of soil. This deep digging of soil has caused and created vast and various depressions on the earth surface. Top soil has been dug away profusely, and has lead to severe sand storms and soil erosion in several places. It has lead to land slides, causing great damage to man. There is another activity that causes damage to soil. That is growing of same crop again and again, without the replacing or replenishing of the nutrients in the soil that are used up by the previous crop, which results in the uselessness of the soil after a few years. Fallow lands (land where a crop is not grown for a long time) are also a cause for soil erosion. The barren land's soil tends to be washed away by natural forces causing soil erosion. Here is good fact to show how the deforestation and fallow land has changed a famous place- Thar Desert is the example of a complete desert made by man because of the monoculture (process of growing of same crop again and again). At one time, the Thar Desert was such a thick forest that Emperor Akbar (a very famous Mughal Emperor of India) went for hunting expeditions.

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